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chromatic (983)

chromatic
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http://wgz.org/chromatic/

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Journal of chromatic (983)

Tuesday April 20, 2010
11:09 PM

Perl 6 Design Minutes for 14 April 2010

[ #40318 ]

The Perl 6 design team met by phone on 14 April 2010. Larry, Allison, Patrick, Will, and chromatic attended.

Larry:

  • on p6l, did a bit of bikeshed paint removal with regard to hyphens vs underscores
  • S02 now explicitly disallows both whitespace and unspace in top level of an interpolation
  • per spec change, when STD is parsing an interpolation inside quotes and looking for a possible postfix, we now presume that a backslash belongs to the quotes and is not an unspace
  • in the src/perl6 directory, renamed all Perl 6 .pm files to .pm6 to avoid confusion
  • this was necessary because the implementation of STD translates Perl 6 back to the corresponding Perl 5
  • the ambiguity was causing problems with tools such as NYTProf
  • Cursor.pmc now prefers .pm6 over .pm in any particular directory when searching for Perl 6 code
  • as usual lately, most of my hacking work was in improving the human interface of the parser
  • STD now distinguishes two final messages: "Parse failed" vs "Check failed"
  • STD now warns on attempts to smartmatch with True or False
  • STD now distinguishes continuable-but-fatal "sorry" messages from immediately fatal "panic" messages
  • sorry messages will eventually fail at check time
  • changed many of STD's semantic errors to use sorry messages when the parse state is not affected
  • modified moritz++'s conflict marker patch to be more like the Clang compiler's behavior
  • conflict markers now emit a "sorry" message and continues parsing one side of the conflict
  • also fixed a buglet that prevented it from processing the conflict marker if first thing in the file
  • while fixing the vws (vertical white space) rule for that, also changed it so that extra lines are now eaten with \V*\v for consistency
  • it had be using \N*\v
  • gimme5 now supports pointing to both ends of missing goal message
  • STD's "Couldn't find final ..." messages now use that capability to point to both ends of the error
  • standard quotes now also use the ~ compositor to set the goal and get that behavior
  • STD will now dwim <<op>> ("Texas hypers") better even if op contains angles
  • suppressed confusing backtracking on ~<< that produced a misleading quotewords error
  • some other patches
  • CORE.setting now recognizes the 'note' function
  • gimme5 now translates note to print STDERR
  • cleaned up some unneeded locmesses
  • Actions.pm now handles prefix metaops without spewing spurious yaml dumps

Allison:

  • worked on TT #389
  • the actual fix was about two lines
  • spent a lot of time fixing tests around it
  • didn't like the original two-line fix
  • fixed it in IMCC by passing along the :nsentry flag
  • NQP-rx still depends on that feature
  • I understood from Patrick that NQP-rx doesn't need that feature
  • don't want to launch that before the 2.3 release
  • worked on a lot of smaller issues
  • worked on the Parrot Developer Virtual Summit
  • will talk about some process changes more, as there are details to work out
  • will work on GC as the next priority
  • useful for Rakudo in general and Parrot concurrency

Patrick:

  • catching up on mail and tickets
  • should get back to coding in the next couple of days

c:

  • worked on the immutable strings branch
  • need a couple of changes in the Rakudo binder
  • now it's time to convince everyone else it's a worthwhile design change
  • going to work on bugfixes
  • will try to land the constant string cache
  • otherwise, added some optimizations

Will:

  • worked on Partcl
  • fixed a Parrot bug that broke Rakudo
  • does Rakudo need TT #389 in 2.3?
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